?????? ????????? ?????????? ??????? ???, ???????? ??????, ??????? ??????? ???????? ????? ?????? ??? ???, ?? ?????? HRC60 ???????? ????, ???????? ?????????? ??????????????? ????? ???, ?????? ??????????????? ???? 3-5 ??? ???? ??????? ???? ??? ???; -?????? ??????? ???????? ???, ????? ??????????????? ??? ?????????? ???? ?????? ???????? ???? ???? ??????????? ?????? ???????? ???????????? ????????? ??? ???? ???? ???? ?????? ??????? ?????? HRC58-HRC62-? ???????; ????? ????????, ???????? ?????? ??????? ??-????? ??????? ?????? ?? ≤ HRC32; ????? ??????? ????????????? ?? ?????? ??? ??? ??????? ????????? (??????? ?????) ????? ?????? 5g ?? ????? ???????? ?????????? ??? ???, ???????????? ?????? ??????? ??????? ??? ????????